561 



Orthoc. 



son River shales ; showing remains of the low rounded ridges 

 which traverse its surface lenhtgwise, nine or ten to one inch 

 of circumference ; chambers displaced and distorted by pressure; 

 but surface show entirely different from other Orthooerata of 

 this formation. Jllh. 



Orthoceras vindobonense, Dawson. Acadian Geology, 



127 1868, page 311, fig. 127 ; septa distant 

 O^ about ^diameter; resembles O. later- 

 ale^ Phil, of England, but smaller, 

 more cylindrical, and septa farther 



Daw. 



apart.. Carb, II me. at Windsor, N. ^,—XIII? 



Orthoceras ? Two fragments found in the Pots- 



J^ ^^ ^gSTlmn^s^' ^^^ 5anc75^c>^6 of Canada. Geol. 



Orthoceras 

 Wa ~ 



? Geol. Canada, 1863, page 121, fig. 



36. 3 6, the 

 cast of 

 the in- 



(J-eot. Cd'i'LCLcLcL . '■■ "" ™i ^liiKi"' t e r n a 1 



cavity (siph uncle) of an Oiihoceras of Calciferous sandstone 

 age. II a. 

 Orthocerata figured by Em nons in his Geol. First Dist. N. 



e, 10^. 5. 0.357. 



Y., 1842, p. 396. 397, figs. 107, 3 ; 109, 5, 6 ; 

 all from the Trenton. — In Pennsvlyania, 

 Mifilin Co. Kishicoquillis Valley. See 

 Hall & Hale's 000 Spec. 201-5 (interior) 

 from Keedsville ; Spec. 203-36 (incrusted 

 E J0P. 6. P.J97 with Paleschara) from Bellefonte; Spec. 

 204-27 (possibly a crusted Endoceras) from Reedsville, all from 

 the top Chazy^ or bottom Irenton heds. — A Trenton Orthoceras 

 from Chambersburg, Franklin Co. (Cat. O, Spec. 3776.) II c. — 



